Neither Plain nor Custify offers a free trial.
Plain is designed for Large Enterprises, Medium Business and Small Business.
Custify is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Plain Starts at $59/Month whereas for Custify Starts at $999.
Some top alternatives to Plain includes TeamSupport, Supportbench, ClientSuccess, Custify, UserIQ, Planhat, Catalyst, Aligned, Freshdesk Customer Success (Formely Freshsuccess) and Really Simple Support.
Some top alternatives to Custify includes Parlor, ClientSuccess, ProsperStack, Salesmachine, Catalyst, Vitally, Freshdesk Customer Success, Churn360 and Freshdesk Customer Success (Formely Freshsuccess).
